Orthodontia appliance.



M. N. FEDERSPIELI.

. ORTHODONTIA AP PLIANOE. APPLIOATIOH FILED JULY 8, 1,912.

1,044,7 4, 1 Patented N0v-.19,1912.

UNITED STATES PATENT OFFICE MdTTHEW N. FEDERSPIEL, OF MILWAUKEE,

WISCONSIN, ASSIGNOR TO BLUE ISLAND SPECIALTY 00., 01* BLUE ISLAND,ILLINOIS, A CORPORATION OF ILLINOIS.

onrironourra APPLIANCE.

Specification of Letters Patent.

Application filed July 8, 1912.

Lil-114,764.

To all whom it may concern:

Be it known that I, MATTHEW N. FEDER- srlnL, a citizen of the UnitedStates, residing at Milwaukee, in the county of Milwaw kee and State ofWisconsin, have invented a new and useful Improvement in OrthodontiaAppliances, of which the following is a specification.

My invention relates to certain new and useful improvements inorthodontia appliances, and is fully described and explained in thespecificationand shown in the accompanying drawings, in which:

Figural is a front elevation of my improved device showing the same inposition; Fig. 2 is a a side elevation; Fig. 4- is' a perspective viewof one of the buccal-tubes, and Fig. 5 is a section on the line 5, ofFig. 1.

While other useful functions for the pres ent device may ultimately bediscovered, the purpose for which it is especially designed is themoving of teeth whichincline forwardly, or outwardly, from their properposition to a considerable extent, In the case, for instance, of acentral incisor inclined forwardly to an abnormal extent, the practicehas heretofore been to apply pressure by one of the. well-known methodsto the tip of said tooth, whereby to force the tip backward and changethe angle of the tooth- This practice has been objectionable because, insome cases at least, the tooth has not turned about the end of the rootas an axis, or center, but about some other point, so that as the tip,has been forced backward, or in, the root has moved out and in somecases the root has even been forced partially out of the jaw. To remedythis difficulty, I provide an arch 6 of wire of ordinary form, carriedby buccal-tubes 7 which are in turn supported by anchor-bands 8. Thearch6 is positionedimmediately outside of the teeth, in close contacttherewith and preferably closely adjacent to the edge of the gum, and.is provided with the usual adjusting mechanism, so that any desireddegree of pressure can be brought to bear on the teeth closely adjacentto the gum line. The arch 6 has two depending arms or links 9'piv-c-tally supported by it, which arms carry a supplemental arch 10,preferably provided with hooks l1 at its ends. Elastic members 12,preferably in the form plan view of the same; Fig. 3 is,

Patented Nov. 1a, 2912. Serial No. 708,392.

the ends of the supplemental arch 10, which arch is so positioned astolie near the tips of the teeth which are to be moved. The

elastic members 12 are shown as engaging hooks 13 on the buccal-tubes,and this is a desirable construction, although it will be understood bythose in the art that these tension-members can be supported in otherways, as for instance, from a suitable fitting on the opposite jaw, inaccordance with common practice. The result of this construction is'thatthe tips of the teeth are pus ed backward gradually by the pressur ofthe supplemental arch 10 superinduced by the tension of the elasticmembers'12, while at the same time the upper portions and roots of theteeth are absolutely prevented from forward movement by the pressurethereagainst of the main arch 6. As a result, the necessary movement ofthe teeth is brought about without any danger of the roots improperlyswinging forward.

I am aware that ccnsiderablevariation is possible in the details of theconstruction herein shown and described, and therefore, by setting forththe preferred form in detail, I do not intend to limit myself thereto,

except as pointed out in the following claims,

in which the intention is to. claim all the novelty inherent in theconstruction as broadly as is permitted by the state of the art.

I claim as new Letters Patent 1. In combination, means engaging a toothnear its tip to move it rearwardly, and independent means engaging thetooth near its root to prevent forward movement and desire to secure bythereof.

2. In combination, an arch to engage a tooth near the gum, and. asecondary arch to engage the tooth near its tip, and means for exertingpressure on said secondary arch.

3. In combination, an arch to engage a tooth near the gum, a secondaryarch, links connecting said arches, and means for exerting pressure onsaid secondary arch.

4. In combination, an arch to engage a tooth near the gum, a secondaryarch, means connecting said arches, and elastic means connected to thesecondary arch to exert pre re thereon.

